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Alcohol's effects on decision making and cognitive processing in a reward uncertainty task
Freya Whittaker1, Angelica DeFalco2, Rachel S Goldblum1
1School of Psychological Science, Oregon State University.
Summary
Alcohol consumption reduces aversion to uncertainty, leading to increased risk-taking in decision-making. This study found alcohol, not placebo, altered choices and brain responses, impacting judgment.
Area of Science:
- Neuroscience
- Psychology
- Behavioral Science
Background:
- Alcohol consumption is linked to increased risk-taking behaviors.
- Laboratory studies show inconsistent results regarding alcohol's effect on risk-taking.
- The specific contexts influencing alcohol-induced risk-taking require further investigation.
Purpose of the Study:
- To investigate alcohol's impact on decision-making within a reward uncertainty framework.
- To determine if alcohol reduces aversion to uncertainty.
- To explore the neural mechanisms associated with alcohol-induced decision-making.
Main Methods:
- Participants received alcoholic, placebo, or nonalcoholic drinks.
- A Reward Uncertainty Task was used to assess choices between certain and uncertain monetary rewards.
- P3 event-related potentials were measured to explore neural mechanisms.
Main Results:
- Non-intoxicated participants showed aversion to uncertainty.
- Alcohol consumption reduced reward uncertainty aversion, indicating a pharmacological effect.
- Alcohol attenuated the P3 response, suggesting disrupted cognitive processing and potentially riskier choices.
Conclusions:
- Alcohol dampens responses to uncertainty in appetitive domains, extending previous findings on aversive stressors.
- Findings suggest alcohol's impact on decision-making is pharmacological, not due to expectancy.
- Further research is needed to develop interventions mitigating alcohol's negative effects on decision-making.
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